DTC 1004

SYSTEM DESCRIPTION
This system has a swirl control valve in the intake passage of each cylinder.
While idling and during low engine speed operation, the swirl control valve closes. Thus the velocity of the air in the intake passage increases, promoting the vaporization of the fuel and producing a swirl in the combustion chamber.
Because of this operation, this system tends to increase the burning speed of the gas mixture, improve fuel consumption and increase the stability in running conditions.
Also, except when idling and during low engine speed operation, this system opens the swirl control valve. In this condition, this system tends to increase power by improving intake efficiency via reduction of intake flow resistance, intake flow.




When engine coolant temperature is below 0°C (32°F) swirl control valve is kept open.




ECM TERMINALS AND REFERENCE VALUE
Specification data are reference values and are measured between each terminal and 43 (ECCS ground).




CONSULT REFERENCE VALUE IN DATA MONITOR MODE
Specification data are reference values.

COMPONENT DESCRIPTION



Swirl Control Valve Control Solenoid Valve
The swirl control valve control solenoid valve responds to signals from the ECM. When the ECM sends an ON (ground) signal, the solenoid valve is bypassed to apply intake manifold vacuum to the swirl control valve actuator. This operation closes the swirl control valve. When the ECM sends an OFF signal, the vacuum signal is cut and the swirl control valve opens.




ON BOARD DIAGNOSIS LOGIC

DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE
Perform "Procedure for malfunction A" first. If the 1st trip DTC cannot be confirmed, perform "Procedure for malfunction B and C".

Procedure for Malfunction A
With CONSULT
(1) Turn ignition switch "ON".




(2) Select "DATA MONITOR" mode with CONSULT.
(3) Wait at least 5 seconds.

OR

With GST
(1) Turn ignition switch "ON" and wait at least 5 seconds.
(2) Select "MODE 7" with GST.

OR

NO TOOLS
(1) Turn ignition switch "ON" and wait at least 5 seconds.
(2) Turn ignition switch "OFF", wait at least 7 seconds and then turn "ON".
(3) Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.

Procedure for Malfunction B
With CONSULT
(1) Start engine and warm it up sufficiently.
(2) Turn ignition switch "OFF" and wait at least 7 seconds.




(3) Turn ignition switch "ON" again and select "DATA MONITOR" mode with CONSULT
(4) Start engine and run it for at least 20 seconds at idle speed.

OR

With GST
(1) Start engine and warm it up sufficiently.
(2) Turn ignition switch "OFF" and wait at least 7 seconds.
(3) Start engine again and run it for at least 20 seconds at idle speed.
(4) Select "MODE 7" with GST.

OR

NO TOOLS
(1) Start engine and warm it up sufficiently.
(2) Turn ignition switch "OFF" and wait at least 7 seconds.
(3) Start engine and run it for at least 20 seconds at idle speed.
(4) Turn ignition switch "OFF", wait at least 7 seconds and then turn "ON".
(5) Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.

Procedure for Malfunction C
With CONSULT
(1) Start engine and warm it up sufficiently.
(2) Turn ignition switch "OFF" and wait at least 7 seconds.




(3) Turn ignition switch "ON" again and select "DATA MONITOR" mode with CONSULT
(4) Start engine and run it for at least 20 seconds at 3,800 rpm under no load.

OR

With GST
(1) Start engine and warm it up sufficiently.
(2) Turn ignition switch "OFF" and wait at least 7 seconds.
(3) Start engine and run it for at least 20 seconds at 3,800 rpm under no load.
(4) Select "MODE 7" with GST.

OR

NO TOOLS
(1) Start engine and warm it up sufficiently.
(2) Turn ignition switch "OFF" and wait at least 7 seconds.
(3) Start engine and run it for at least 20 seconds at 3,800 rpm under no load.
(4) Turn ignition switch "OFF", wait at least 7 seconds and then turn "ON".
(5) Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.

EC-SWL/V-01 Swirl Control Valve Control Solenoid Valve (DTC P1130):

WIRING DIAGRAM







DIAGNOSTIC PROCEDURE

COMPONENT INSPECTION
Swirl Control Valve
Supply vacuum to actuator and check swirl control valve operation.




Condition / Swirl control valve
Supply vacuum to actuator / Close
No supply / Open

Swirl Control Valve Control Solenoid Valve
Check solenoid valve air passage continuity.




Condition / Air passage continuity between (A) and (B) / Air passage continuity between (A) and (C)
12V direct current supply between terminals (1) and (2)
No supply / No / Yes

If NG, replace solenoid valve.

One-way Valve
Check one-way valve air passage continuity.




Condition / Air passage continuity
Blow air from side B to A / Yes
Blow air from side A to B / No

If NG, replace one-way valve.

Vacuum Tank




Check vacuum tank leakage.
Apply vacuum -80.0 kPa (-600 mmHg, -23.62 inHg, -11.60 psi). Then keep it for 10 seconds and check there is no leakage.

Swirl Control Valve Control Vacuum Check Switch
1. Disconnect swirl control valve control vacuum check switch harness connector.




2. Use vacuum pump to apply vacuum to swirl control valve control vacuum check switch as shown in figure.
3. Start engine.
4. Check voltage between terminal 2 and engine ground with CONSULT or tester.

Pressure / Voltage (V)
More than -18.7 kPa (-140 mmHg, -5.51 inHg) / Engine ground
-18.7 to -22.7 kPa (-140 to -170 mmHg, -5.51 to -6.69 inHg) / Engine ground or Approx. 4.8
Less than -22.7 kPa (-170 mmHg, -6.69 inHg) / Approx. 4.8

5. If NG, replace swirl control valve control vacuum check switch.